That’s a much different problem…If you can isolate this to a specific, reproducible case, that would be fantastic…and I’ll be sure it goes to the proper developer.
As for your model, I’m actually seeing things spin about 5x faster in V6 with the clipping plane ON, and it’s actually clipping something. If I move the clipping plane up above all of the geometry so that it’s not clipping anything, then I get the same speeds I do when the clipping plane is turned OFF. In V6 I get roughly 135fps in a maximized Shaded viewport. In V5, running the exact same settings, I get roughly 26fps.
In V6, go into the OpenGL Settings page… Uncheck the “GPU Tessellation” box near the top…and see if your timings are faster or slower.
Let me know.
Thanks,
-J